Here is the bleed screw on the radiator. Also undo it when draining the system. When filling make sure you fill the radiator first and ideally mix the coolant first. Once a steady stream comes out of the radiator bleed with no bubbles then tighten it while it still is flowing, expect to loose some coolant. Then proceed to the top hose with the bleeder screw again keep adding coolant till it runs with no bubbles tighten the screw with coolant still running. Top up to maximum, run the engine till the fan runs which may take a while, then check level with the engine cold. Top up if necessary.